oxlasers 405nm 500mW Blue Violet Laser Module for 3D Printer 12V Focusable DIY UV Laser Head for Engraving and Cut with TTL PWM|3D Printer Parts & Accessories| - AliExpress
Thorlabs - LP405C1 405 nm, 30 mW, G Pin Code, SM Fiber-Pigtailed Laser Diode, Collimator Output